Mapping and ID-ing Philadelphia 2010 Census Tracts with D3 and TopoJSON
Data from Open Data Philly - Census Tracts.
Converted to topojson whilst preserving all fields.
Mapping and ID-ing Philadelphia 2010 Census Tracts with D3 and TopoJSON
Data from Open Data Philly - Census Tracts.
Converted to topojson whilst preserving all fields.
<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
path { | |
fill: #aaa; | |
stroke: #fff; | |
stroke-width: .75px; | |
pointer-events: all; | |
} | |
text { | |
font-family: sans-serif; | |
font-size: 75px; | |
color: #aaa; | |
} | |
</style> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="http://d3js.org/topojson.v0.min.js"></script> | |
<script> | |
var width = 800, | |
height = 700; | |
var projection = d3.geo.mercator() | |
.center([-75.12, 40.05]) | |
.scale(100000); | |
var path = d3.geo.path() | |
.projection(projection); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
var text = svg.append("text") | |
.attr("y", height/8) | |
.attr("text-anchor", "left"); | |
d3.json("census_tracts.json", function(error, topology) { | |
svg.selectAll("path") | |
.data(topojson.object(topology, topology.objects.Census_Tracts_2010).geometries) | |
.enter().append("path") | |
.attr("class", "tracts") | |
.attr("id", function(d){return d.properties.NAME10;}) | |
.attr("d", path) | |
.on("mouseover", function(){d3.select(this).style("fill", "#ff0"); | |
text.text("tract: " + this.id);}) | |
.on("mouseout", function(){d3.select(this).style("fill", "#aaa"); | |
text.text("");}); | |
}); | |
</script> |